Note 5 - Fair Value (Details) - Change in Fair Value of Consideration Liability (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Sep. 28, 2014	Mar. 29, 2014
Altior [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Consideration liability fair value		$ 2,973
Less: Adjustment to purchase consideration	(2,973)
Consideration liability fair value	0	2,973
Cadeka Microcircuits [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Consideration liability fair value		1,370
Less: Adjustment to purchase consideration	(1,370)
Consideration liability fair value	$ 0	$ 1,370